Electronic Devices With Finger Sensors

Abstract

An electronic device such as a head mounted device may have an inner display that displays an image for a user through lenses. Head-mounted support structures may be used to support the display and lenses. One or more external displays may be publicly viewable while the head-mounted device is being worn. The head-mounted support structures may have a front face on which an external display is mounted. One or more finger sensors that are configured to detect touch input, force input, and/or other input from an external object such as a user's finger may be included in the head-mounted device. A finger sensor may have an elongated shape that runs along a peripheral edge of an external display on the front face. Finger sensors may also be located on other portions of the support structures.

What is claimed is: 
     
         1 . A head-mounted device, comprising:
 a head-mounted housing;   a sensor located on the head-mounted housing;   left and right displays supported by the head-mounted housing;   left and right lenses through which the respective left and right displays are viewable from eye boxes, wherein the left and right lenses are separated by a distance; and   an actuator configured to adjust the distance in response to input to the sensor.   
     
     
         2 . The head-mounted device defined in  claim 1  wherein the head-mounted housing comprises metal. 
     
     
         3 . The head-mounted device defined in  claim 1  wherein the head-mounted housing comprises upper and lower peripheral edges and wherein the sensor is located on the upper peripheral edge of the head-mounted housing. 
     
     
         4 . The head-mounted device defined in  claim 3  further comprising a layer of glass extending between the upper and lower peripheral edges. 
     
     
         5 . The head-mounted device defined in  claim 4  wherein the layer of glass is curved. 
     
     
         6 . The head-mounted device defined in  claim 1  further comprising a head strap coupled to the head-mounted housing. 
     
     
         7 . The head-mounted device defined in  claim 6  further comprising a finger sensor on the head strap. 
     
     
         8 . The head-mounted device defined in  claim 7  wherein the finger sensor comprises a touch sensor. 
     
     
         9 . The head-mounted device defined in  claim 1  further comprising an additional sensor on the head-mounted housing that is used to adjust audio volume. 
     
     
         10 . The head-mounted device defined in  claim 9  wherein the additional sensor comprises a button. 
     
     
         11 . A head-mounted device, comprising:
 a head-mounted housing;   a display supported by the head-mounted housing;   a lens through which the display is viewable from an eye box;   a head strap coupled to the head-mounted housing; and   a touch sensor on the head strap.   
     
     
         12 . The head-mounted device defined in  claim 11  wherein the touch sensor comprises a capacitive touch sensor. 
     
     
         13 . The head-mounted device defined in  claim 11  wherein the head-mounted housing has upper and lower edges, the head-mounted device further comprising a curved glass layer extending between the upper and lower edges. 
     
     
         14 . The head-mounted device defined in  claim 13  further comprising a finger sensor on the upper edge of the head-mounted housing that is used to adjust an interpupillary distance. 
     
     
         15 . The head-mounted device defined in  claim 13  further comprising a finger sensor on the upper edge of the head-mounted housing that is used to adjust audio volume. 
     
     
         16 . A head-mounted device, comprising:
 a curved glass layer;   a head-mounted housing that forms a ring-shaped border around the curved glass layer;   displays and lenses supported by the head-mounted housing; and   a volume button on the head-mounted housing.   
     
     
         17 . The head-mounted device defined in  claim 16  wherein the head-mounted housing has upper and lower surfaces and wherein the volume button is located on the upper surface. 
     
     
         18 . The head-mounted device defined in  claim 17  further comprising:
 a finger sensor on the upper surface; and 
 an actuator configured to adjust a distance between the lenses in response to input to the finger sensor. 
 
     
     
         19 . The head-mounted device defined in  claim 16  further comprising:
 a head strap coupled to the head-mounted housing; and 
 a touch sensor on the head strap. 
 
     
     
         20 . The head-mounted device defined in  claim 19  wherein the touch sensor comprises a capacitive touch sensor.